Chemical calculations (separate chem)

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield

• mole ratio

• actual yield

• percentage yield

What is the measured amount of a product obtained from a chemical reaction?

• mole ratio
• theoretical yield
• percentage yield
• actual yield

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

Tags

NGSS.HS-PS1-7

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation?   P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4
• 4:6
• 1:3
• 3:1

Tags

NGSS.HS-PS1-7

When does a chemical reaction stop?

• When the lab is finished
• When the excess reactant is used up
• When the limiting reactant is used up
• Chemical reactions never stop

Balance the equation below

C₂H₆ + O₂ --> CO₂ + H₂O

• 1:1:1:1

• 1:2:1:2

• 1:3:2:3

• 2:7:4:6

• 2:9:5:7

What is the ratio of ethane (C₂H₆) to water (H₂O)?

2C₂H₆ + 7O₂ --> 4CO₂ + 6H₂O

Pick TWO answers

• 2:6

• 1:2

• 1:3

• 1:4

• 2:4

How many moles of water can you produce from 1 mole of ethane?

2C₂H₆ + 7O₂ --> 4CO₂ + 6H₂O

• 1

• 2

• 3

• 4

• 6

What is the molar mass (Mr) of ethene?

2C₂H₆ + 7O₂ --> 4CO₂ + 6H₂O

• 12

• 18

• 30

• 44

• 60

What is the molar mass (Mr) of water?

2C₂H₆ + 7O₂ --> 4CO₂ + 6H₂O

• 12

• 18

• 30

• 44

• 60